Calculate hosts panel column width based on actual hostname lengths

Cargo.lock

@@ -279,7 +279,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.280"
+version = "0.1.281"
 dependencies = [
  "anyhow",
  "chrono",
@@ -301,7 +301,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.280"
+version = "0.1.281"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -325,7 +325,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.280"
+version = "0.1.281"
 dependencies = [
  "chrono",
  "serde",

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.280"
+version = "0.1.281"
 edition = "2021"
 
 [dependencies]

dashboard/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard"
-version = "0.1.280"
+version = "0.1.281"
 edition = "2021"
 
 [dependencies]

dashboard/src/ui/mod.rs

@@ -503,7 +503,7 @@ impl TuiApp {
 
         // Calculate hosts panel height dynamically based on available width
         let hosts_inner_width = content_chunks[0].width.saturating_sub(2);
-        let hosts_content_height = HostsWidget::required_height(self.available_hosts.len(), hosts_inner_width);
+        let hosts_content_height = HostsWidget::required_height(self.available_hosts.len(), hosts_inner_width, &self.available_hosts);
         let hosts_height = hosts_content_height + 2; // Add borders
 
         // Left side: hosts panel on top, system panel below

dashboard/src/ui/widgets/hosts.rs

@@ -55,17 +55,23 @@ impl HostsWidget {
     }
 
     /// Calculate the required height for hosts panel based on host count and available width
-    pub fn required_height(num_hosts: usize, available_width: u16) -> u16 {
+    pub fn required_height(num_hosts: usize, available_width: u16, hostnames: &[String]) -> u16 {
         if num_hosts == 0 {
             return 1;
         }
-        // Estimate column width: icon(2) + arrow(2) + max_hostname(~12) + padding(2) = ~18
-        let col_width = 18u16;
+        let col_width = Self::calculate_column_width(hostnames);
         let num_columns = (available_width / col_width).max(1) as usize;
         let rows_needed = (num_hosts + num_columns - 1) / num_columns;
         rows_needed.max(1) as u16
     }
 
+    /// Calculate column width based on longest hostname
+    fn calculate_column_width(hostnames: &[String]) -> u16 {
+        // icon(2) + arrow(2) + hostname + asterisk(1) + padding(1)
+        let max_name_len = hostnames.iter().map(|h| h.len()).max().unwrap_or(8);
+        (2 + 2 + max_name_len + 1 + 1) as u16
+    }
+
     /// Render hosts list in dynamic columns based on available width
     pub fn render<F>(
         &mut self,
@@ -88,8 +94,8 @@ impl HostsWidget {
         // Store viewport height for scroll calculations
         self.last_viewport_height = area.height as usize;
 
-        // Calculate column width and number of columns that fit
-        let col_width = 18u16;
+        // Calculate column width based on actual hostname lengths
+        let col_width = Self::calculate_column_width(available_hosts);
         let num_columns = (area.width / col_width).max(1) as usize;
         let rows_per_column = (available_hosts.len() + num_columns - 1) / num_columns;
 

shared/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-shared"
-version = "0.1.280"
+version = "0.1.281"
 edition = "2021"
 
 [dependencies]